JSON Schema Generator
Generate drafts of JSON schemas directly from sample JSON instances. Fast, free, and fully client-side.
Input source
Result / Output
How the JSON Schema Generator Works
Automatically generates a formal JSON Schema (Draft-07 / 2020-12) from sample JSON data, inferring types, required fields, and array item schemas.
Usage Example
Paste sample API responses to generate validation schemas instantly for Swagger/OpenAPI documentation.
Frequently Asked Questions
Does it infer required properties and data types?
Yes, it detects string, number, integer, boolean, null, array, and object types automatically.
Browse more
See all JSON tools.